John b



(No Model.)

J. B. ORIVAQ BOOKBIN DING.

No.562,649. PatenitedJunezs, 1896.

ATTORNEYS.

ANDREW B GRMMM. FHDN'UTHQWASHINWKDG I UNITED STATES PATENT OFFICE.

JOHN B. ORIVA, OF NEXV YORK, N. Y.

BOOKBINDING.

SPECIFICATION forming part of Letters Patent No. 562,649, dated June 23, 1896.

Application filed March 18, 1896. Serial No. 583,727. (No model.)

To all whom it 72mg concern:

Be it known that 1, JOHN B. ORIVA, of New York city, in the county and State of New York, have invented a new and useful Improvement in Bookbinding, of which the following is a full, clear, and exact description.

The obj eet of the invention is to provide a binding for books which will be strong and durable without necessitating the destruction of the grain in the leather used for thebinding.

Ileretofore it has been often necessary to so crimp and press the leather at the corners of book-covers that the grain will be destroyed and the beauty of the binding very much impaired.

My invention. consists in a peculiar manner of constructing the binding, by which the corners are made as strong and durable as heretofore and at the same time the grain of the leather is left in its original beauty.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the figures.

Figure 1 is a perspective view of a book supplied with a binding in accordance with my invention. Fig. 2 is a fragmentary plan view showing the pattern of the corner. Fig. 3 is a similar view showing the first step in the folding of the pattern; and Fig. 4. is a similar view, on an enlarged scale, showing the fold complete.

The class of bookbinding to which my invention is particularly adapted is that in which the book is covered by an integral sheet of leather, as shown in Fig. 1, and each corner of this sheet must be constructed so that it will be strong and durable. I attain this end by forming each corner with an edge a, curved inwardly, as shown in Figs. 2 and 3, this edge being contiguous at its inner end to an edge b,running outwardly and into a double-curved edge e. In folding such a corner the edge e is first bent on the dotted line 6', (seen in Fig. 2,) said edge a forming a flap, the folded position. of which is best shown in Fig. 3. This folding of the flap e leaves a portion of the double-curved edge 0 yet unfolded, and this portion is folded inwardly on the curved dotted line e to the position shown best in Fig. 3, and forming a flap j", which is crimped dovm on the main portion of the back and is, together with the flap e, cemented to said main portion, care being taken to keep the outer edge of the flap f regularly curved, the chord of such curve being the same as the chord of the curve described by the edge a. The operation is completed by folding over the flap g on the dotted line g, so that said flap will occupy the position shown best in Fig. 4. The flap 9 is firmly cemented in place. It will thus be seen that by means of this construction the corners of the binding are made strong and durable, and it will also be seen that the grain of the leather is preserved in its natural beauty, the obliteration of the grain by crimping an exposed part being avoided.

Fig. 1 shows the completed binding and it also shows the arrangement of the flap 9, whereby its edge will be inward from the leaves it of the book, so that in this position the said edge will be less prominent than in other positions. It will also be seen that this edge 9 is the only edge to be seen in a binding constructed after my invention.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- 1. A bookbinding corner having two flaps, one of which is folded inward and one edge of said flap being crimped against the main portion of the bookbinding, the remaining flap being folded over and secured above the crimped portion to hide the same, substantially as described.

2. A bookbinding corner, the pattern of which is formed with a curved edge a contiguous to a short edge I) running into a double-curved edge c, said pattern being adapted to fold so that a portion of the curved edge 0 will form a flap to be erimped closely against the main portion of the cover, and so that the curved edge a will form a flap to lie over and conceal the crimped portion, substantially as described.

3. A bookbinding corner having two flaps, one of which is folded upon and crimped on the main portion and the second of which is folded over and secured on the first flap so as to hide the same, substantially as described.

J OHN B. ORIVA. Witnesses ISAAC B. OWENS, A. A. HOPKINS. 

